Saw-filing device



l E 4 I m.. u nl. 1 Il J G u 1 .ad lwww.. N D ad B Y u A G. a n n 0 1 ua/f u u s ,F f/. 5 l 3 2 A 9 1.. 3 1 m Patented Oct. 13, 1925.

1,557,494i Vl? JOHN' GLANG, OF SAN-FRANCISCO', CALIFORNIA, ASSIGNOR' OE"ONE-'HALF T0 GEORGE QSTERTAG, O-F'SAN FRANCISCO; CLIFORNLA.

SAW-FILING 'DEVICE Application 'ledodt'ober 213.1924..` Serial No.744,898.

' ried inra supporting frame and having co operating therewith-aI'nechanism` for feed ing the saw to' intermittently bringgthesuccessive teethI thereof: into sharpening posi'- tion relative to the'wheel. lt is the object ofthe invention toprovide an improved sawsharpening device of this type.

lith the above and other objects in view, my invention consists' in`the' features of construction. and. operation setV forth inthefollowing. specificationl illustrated in the accompanying. drawingInsu'cli; drawing annexed hereto and forming' a part f thisspecifica-tion, E have Shown one specific embodiment'- of my invention,but` it will be understood that the invention.. can Vbe otherwiseembodli'ed and?` that the. drawing is notl to be construedasdefining orlimiting the" `scope of' the invention, the claims appendedV to`thisspeciiication being relied upon for tlratpurpose.

Referring to the tigwresoffthe drawing: 4 Fig. l is a. side elevation ofmy improved device.

Fig. 2 isa plan viewthereof.

Fig. 3 is a. rear elevation thereof.

Fig. 4 lis a fragmentary sectionalview taken on line l-t of Fig. 3..

Referring more specifically to the. drawing by reference characters, 1indicates a frame having a supporting arm 2 adapted to be rigidlysecured to a portion of the sawing machine/or an adjacent structure 3.The upper portion of the frame l has a pair of forwardly extending arms4 adapted to support a moto-r 5 therebetween and a forwardly projectingbracket 6 at its lower portion adapted to support the operatingmechanism of the device, all of which will now be specificallydescribed.

The motor 5 is mounted for pivotal movethreaded ,thereintor the sawteeth to be sharpened.

ment on trunnions 7' adjustable in slots 8 in the armsl', screw threadedelements 9 being adapted` to secure the trunnions in placerin: theslots. A saw sharpening wheel 1:0 is mounted on the downwardlyext-ending shaft l1 of the motor.A A band saw is in.- dicated at 121,:aroller l-being provided rearwardly thereof oppositeA and to take theoperating thrust ofthe wheel 10:

Rotatablymounted in the bracket 6 is a shaft 14 having` a pair ofeccentrics 15V and 1.6 thereon-5 Ya handle l? ybeing provided 4ontliesha'ft for rotating the samer` One end of an arm 19 is securedrigidly tol-the moto-r, and a screw 20 threaded into the other endthereof engagesagainst the eccentric I5. spring 2l normally holds themotor with its sharpening wheel l() in engagement with the saw, rotationof the eccentrick being adapted tol pivot themotor oni its trumrions 'Ein a manner to` withdraw the wheel from the saw in the directionof thevarrow, Fig. I.l VEhe position of the wheel can` be` adjusted by rotatingthe screw j j Y A Ueshaped element 22? pivoted toI the bracket 6i at23:A has a screwQ/l` journalled transversely thereof andY screw threadedthrough one. end-of a bar 2531 a knob 26 being. provided for rotatingthe screw. To the other end off-this bar is `pivotedwan upwardlyextending member 27 having a saw too-tlm engaging element 28 thereon anda second saw tooth engaging element 29 screw A spring 30 normally holdsthe', elements in engagement with the -sawteetlr A spring 3l normallyholds the bar 25i downwa-rdly'` against the eccentric 16, and :ascrewBQlimi-ts this downward movement. j

TheA device being mounted on the saw structure in the manner shown anddescribed, the following adjustments are made. The motor isaadjusted intlieslots 8 toa position wherein the angle ofthe periphery of thesharpening wheel l@ corresponds to-` that of As illustrated, the wheelis set to operate 0n both faces a and b of each saw tooth. It will beunderstood, however, that the motor and wheel can be set to a positionin the slots 8 to operate only on one of these faces if desired, itbeing obvious that adjustment in these slots changes the angularposition of the wheel relative to the saw teeth. The

whereby the same is adapted to engage the saw tooth whatever may be therotative position f the element 29; this construction permitting suchelement to be' adjusted to any position relative to the member 28 andstill leave the element 29 in proper saw tooth engaging position.

The said adjustments having been properly made, the operation of theldevice is as follows:

The operator continually rotates the crank 17. Engagement'of the screw20 with. the lower portion of the eccentric l5 permits theJ wheel toengage and sharpen the saw. The higher portion of this eccentricoperates to pivot` the motor and withdraw the wheel from the saw. Theeccentric 16 operates directly thereafter to move the bar and element 27upwardly to feed the saw the distance of one tooth, the screw 32thereafter permitting the bar and element to drop below the next toothready for the next feeding operation. The eccentric l5 thereafterpermits the spring 2l to pivot the motor to engage the sharpening wheell() thereof with the saw. The operation is entirely continuous andautomatic, the operator being only required to rotate the crank 17.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. A saw sharpening device comprising the combination of a frame havingmeans thereon for supporting the same on a saw carrying support adjacentthe saw, an electric motor pivoted on the frame, a saw sharpening wheelon the motor shaft, resilient means normally holding the motor and wheelin saw sharpening position, saw feeding means comprising saw teethengaging means carried by the frame, a shaft on the frame, a pair ofeccentrics on the shaft, and means cooperating therewith andrespectively adapted to pivot the motor to shift the wheel out ofengagement with the saw and to thereafter operate the saw feeding means.

2. A saw sharpening device comprising the combination of a frame havingmeans thereon for supporting the same on a saw carrying support adjacentthe saw, an electric motorpivoted on the frame, a saw sharpening wheelon the motor shaft, resilient means normally holding the motor and wheelin saw sharpening position, saw feeding means comprising saw teethengaging means carried by the frame, a shaft on the frame, a

`pair of eccentr'ics on the shaft, means cooperating therewith andrespectively adapted to pivot the motor to shift they wheel out ofengagement with the saw and to thereafter operate the saw feeding means,and adjusting means between each eccentric and the mechanism operatedthereby.

3. A saw sharpening device comprising the combination of a frame havingmeans thereon for supporting Jthe same on a saw carrying supportadjacent the saw, an electric motor pivoted on the frame, a sawsharpening wheel on the motor shaft, saw feeding means comprising sawteeth engaging means carried by the frame, a-shaft in the frame, meansincluding co-operating means on the shaft for pivoting the motor toshift the wheel out of engagement with the saw and thereafter operatethe saw feeding means as the shaft is rotated, and means for adjustingthe pivotal axis of the motor on the frame transversely of the rotaryaxis of the motor.

4. A saw sharpening device comprising the combination of a frame havingmeans thereon for supporting the same on a saw carrying support adjacentthe saw, an electric motor pivoted on the frame, a saw sharpening wheelon the motor shaft, saw feeding means comprising saw teeth engagingmeans lcarried by the frame, a shaft in the frame,

a pair of eccentrics on the shaft, means connected to the motor andengaging one of the eecentrics, a bar having one end connected to thesaw feeding means, its other end pivoted to the frame and itsintermediate p0rtion engaging the other eccentric, and means foradjusting the pivotal throw of the bar.

5. A saw tooth engaging member comprising an element adapted to engage asaw tooth, and a second circular element adapted to engage an adjacentsaw tooth and having a screw threaded shank threaded into the firstelement, rot-ation of the said second eletive to the first element.

- JOHN crane.

